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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Wilberforce
Since the pins will be connected to two devices - you might get unwanted results. I2c usually has a pull up so that might also cause issues with serial.
Why can you just use another 2 pins an keep them separate?